...

src/ir/interp.zig

@@ -1124,6 +1124,14 @@ pub const Interpreter = struct {
                 }
                 return .{ .aggregate = fields };
             },
+            .vtable => |func_ids| {
+                // Vtable is a struct of function refs — represent as aggregate of func_ref values
+                const fields = self.alloc.alloc(Value, func_ids.len) catch return .undef;
+                for (func_ids, 0..) |fid, i| {
+                    fields[i] = .{ .func_ref = fid };
+                }
+                return .{ .aggregate = fields };
+            },
         };
     }